Battery case



FIG. 1 is a Front elevational view of a battery case showing my new design;

FIG. 2 is a Rear elevational view thereof;

FIG. 3 is a Left side view thereof;

FIG. 4 is a Right side view thereof;

FIG. 5 is a Top plan view thereof; and,

FIG. 6 is a Bottom plan view thereof.

The broken lines in the drawings are for the purpose of illustrating portions of the battery case that form no part of the claimed design. 

CLAIM The ornamental design for a battery case, as shown and described. 